Re: take a sequence of numbers 2 at a time, print numbers and their product?

[WJ]

Mark Tarver wrote:

> > The simple fact is that a loop form will
> > beat any other syntax hands down in terms of succinctness and
> > clarity
>
> In a modern FPL not always and not here.
>
> (define pp
> [X Y | Z] -> (do (output "~A x ~A = ~A~%" X Y (* X Y)) (pp Z))
> _ -> _)

R:

pp = function(nums)
do.call(function(a,b,...) if (!missing(b)) {cat(a,"*",b,"=",a*b,"\n")
Recall(...)},
nums)

pp(list(2,3, 4,5, 8,9))

2 * 3 = 6
4 * 5 = 20
8 * 9 = 72

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